ctext-pre-write-conversion barfs

[Tak Ota <Takaaki.Ota@am.sony.com>]

2002-02-22  Eli Zaretskii  <eliz@is.elta.co.il>

	Support for ICCCM  Extended Segments in X selections:

	* international/mule-conf.el (ctext-no-compositions): New coding
	system.
	(compount-text-no-extensions): Renamed from compound-text.
	(x-ctext-no-extensions, ctext-no-extensions): Aliases for
	compound-text-no-extensions.
	(compound-text): Redefined using post-read and pre-write
	conversions.

	* international/mule.el (non-standard-icccm-encodings-alist)
	(non-standard-designations-alist): New variables.
	(ctext-post-read-conversion, ctext-pre-write-conversion): New
	functions.

`ctext-pre-write-conversion' is called from `writ-region' as

  annotations = build_annotations_2 (start, end,
				     coding.pre_write_conversion, annotations);

As an irregular case write-region sometimes passes a string in
`start'.  It seems like ctext-pre-write-conversion is not prepared to
receive a string in START.

-Tak

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